Craftsman's Garage Door Opener
I have moved in a house with Craftsman's Garage Door opener. A couple of nights ago, I heard the garage door open and by the time I got to the garage, I don't know if some intruder managed to open it or it opened by itself? Is there a possibility that it opens by itself? don't have a remote for it on my keys, so it was not me.
Also, as a result, I am thinking I need to change the code, and I don't have the manual. Is there anyway, I could get the manual for it?